Transforming Energy Risk into Predictable Savings for Utilities

Transform Energy Risk into Predictable Savings

This example is a typical use case for Wattstor’s customer success.

Utilities are under increasing pressure to decarbonise, stabilise long-term costs, and expand onsite renewable generation — all while navigating tight grid constraints and increasingly volatile wholesale prices. Traditional solutions typically point toward costly grid reinforcements or short-term contracts that offer little protection from market shocks.

Wattstor changes the equation. By combining onsite solar generation, battery energy storage, DC-coupled technology, intelligent optimisation and a long-term smart tariff, Wattstor enables utilities to turn energy volatility into predictable long-term value.

Project Snapshot

The Challenge

Like many utility operators, the organisation faced intersecting pressures that made expanding onsite renewables both complex and expensive:

• Limited grid capacity restricted the amount of generation that could be added without upgrading the connection.

• Unpredictable wholesale prices made long-term budgeting feel more like speculation than planning.

• Corporate sustainability goals demanded accelerated carbon reduction across operations.

Without a smarter alternative, the utility would be forced to rely on reinforcement projects costing millions — or accept ongoing exposure to volatile energy markets. Neither option supported long-term cost control or decarbonisation.

Wattstor was brought in to provide a future-proof solution that avoided infrastructure upgrades while delivering stable, low-carbon energy at scale.

The Solution

Wattstor engineered an integrated renewable-energy system combining:

• Solar PV generation sized to cover a large share of onsite demand.

• Battery energy storage (2–10 MWh range) to capture excess energy and discharge during peak periods.

• DC-coupled technology, maximising efficiency and enabling simultaneous charging from solar without conversion losses.

• Intelligent EMS controls, optimising self-consumption, minimising grid imports and avoiding export constraints.

• Price Protect, Wattstor’s long-term smart tariff with a 20 p/kWh price cap fixed for 25 years and 0% annual price increases.

The Price Protect tariff blends the benefits of variable wholesale pricing with the security of a guaranteed price ceiling — ensuring the utility always pays below market highs while maintaining full cost predictability.

Together, this approach delivers stable, low-carbon power without exceeding existing grid limits turning energy volatility into a manageable, strategic advantage.

With this integrated approach, Wattstor created an energy ecosystem that supports both operational performance and long-term sustainability.

Without Wattstor, the business faces unpredictable costs and escalating grid reliance. With Wattstor, they achieve stable budgeting, protect margins and accelerate decarbonisation.

The Results

This integrated approach can deliver up to £10 million in net savings over 25 years, with annual savings reaching £500,000. By maintaining a fixed 20 p/kWh price cap with zero annual increases, the utility gains full visibility over long-term operational costs — something traditional procurement models simply cannot deliver.

At the same time, the combination of onsite solar and battery storage reduces reliance on the grid, smooths peak demand, and avoids exposure to wholesale price spikes. This significantly strengthens energy security across critical infrastructure while enabling measurable, large-scale carbon reduction.

Financial Benefits

Wattstor’s Price Protect solution goes far beyond sustainability. It delivers financial resilience and control over one of the highest-impact cost lines in any utility operation:

• Budget certainty: predictable costs for 25 years.

• Margin protection: stable pricing strengthens profitability.

• ESG compliance: measurable CO₂ reductions support net-zero reporting.

• Futureproofing: insulation from regulatory and policy volatility.

• Smart optimisation: automated orchestration of solar, storage, and grid imports maximises value.

What This Means for Utilities

This model demonstrates that utilities can secure long-term cost stability while significantly reducing their reliance on the grid. With predictable pricing capped at 20 p/kWh for 25 years, substantial annual savings, and up to 100,000 tonnes of CO₂ avoided, the solution provides a stable foundation for long-term planning. It strengthens energy security, accelerates decarbonisation, and converts energy volatility into a dependable, strategic advantage — all without costly infrastructure upgrades.

By combining onsite renewable generation, intelligent storage, and a smart tariff, Wattstor enables utilities to turn energy risk into predictability. The result is long-term price stability, carbon reduction, and a proven path toward operational resilience.

Contact our team: [email protected]